@article{MZ_1968__104_170925,
     author = {Martin G\"otzky},
     title = {Unverk\"urzbare {Produkte} und {Relationen} in unit\"aren {Gruppen.}},
     journal = {Mathematische Zeitschrift},
     pages = {1--15},
     publisher = {mathdoc},
     volume = {104},
     year = {1968},
     zbl = {0157.36003},
     url = {http://geodesic.mathdoc.fr/item/MZ_1968__104_170925/}
}